The race is on! Here's how to get your Mage Tower appearance before time runs out
Guide: How to unlock the new Artifact Appearance in patch 7.2 | World of Warcraft GamePlay Guides
Reopening the Mage Tower with Legion Timewalking in 9.1.5 - Wowhead News
With all this Mage Tower talk: Even if it was kinda easy in the end i'm still proud of accomplishing the Mage Tower challenge on every spec in Legion : r/wow
Artifact Appearance Unlocks After Legion - News - Icy Veins